Ecthesis

The Ecthesis (from Greek εκθεσις, "statement of faith") was a heretical formula issued in 638 by Emperor Heraclius.

It forbade the mention of "energies," either one or two, in the person of Jesus Christ. It also asserted that the two natures of Christ were united in a single will (i.e., Monothelitism). It had been drafted earlier in 638 by Patriarch Sergius of Constantinople after consultation with Pope Honorius of Rome. It was accepted by synods held in the Imperial capital, but quickly repudiated by Heraclius as well as Honorius' two successors (Popes Severinus and John IV).